Explanation/Reference:
Explanation: C&A consists of four phases in a DITSCAP assessment. These phases are the same as NIACAP phases. The order of these phases is as follows: 1.Definition: The definition phase is focused on understanding the IS business case, the mission, environment, and architecture. This phase determines the security requirements and level of effort necessary to achieve Certification & Accreditation (C&A).
2.Verification: The second phase confirms the evolving or modified system's compliance with the information. The verification phase ensures that the fully integrated system will be ready for certification testing. 3.Validation: The third phase confirms abidance of the fully integrated system with the security policy. This phase follows the requirements slated in the SSAA. The objective of the validation phase is to show the required evidence to support the DAA in accreditation process. 4.Post Accreditation: The Post Accreditation is the final phase of DITSCAP assessment and it starts after the system has been certified and accredited for operations. This phase ensures secure system management, operation, and maintenance to save an acceptable level of residual risk.

is incorrect. A Risk Executive facilitates the sharing of security risk-related information among authorizing officials.

Trusted computing base (TCB) refers to hardware, software, controls, and processes that cause a computer system or network to be devoid of malicious software or hardware. Maintaining the trusted computing base (TCB) is essential for security policy to be implemented successfully. Answer D is incorrect. Internet Protocol Security (IPSec) is a standard-based protocol that provides the highest level of VPN security. IPSec can encrypt virtually everything above the networking layer. It is used for VPN connections that use the L2TP protocol. It secures both data and password. IPSec cannot be used with Point-to-Point Tunneling Protocol (PPTP). Answer A is incorrect. The Common data security architecture (CDSA) is a set of layered security services and cryptographic framework. It deals with the communications and data security problems in the emerging Internet and intranet application space. It presents an infrastructure for building cross-platform, interoperable, security-enabled applications for client-server environments. Answer B is incorrect. An application programming interface (API) is an interface implemented by a software program which enables it to interact with other software. It facilitates interaction between different software programs similar to the way the user interface facilitates interaction between humans and computers. An API is implemented by applications, libraries, and operating systems to determine their vocabularies and calling conventions, and is used to access their services. It may include specifications for routines, data structures, object classes, and protocols used to communicate between the consumer and the implementer of the API.

Explanation/Reference:
Explanation: Security controls are safeguards or countermeasures to avoid, counteract, or minimize security risks. The following are the types of security controls for information systems, that can be employed by an organization: 1.System-specific controls: These types of security controls provide security capability for a particular information system only. 2.Common controls: These types of security controls provide security capability for multiple information systems. 3.Hybrid controls: These types of security controls have features of both system-specific and common controls. AnswerC is incorrect. It is an invalid control.

The configuration management system ensures that proposed changes to the project's scope are reviewed and evaluated for their affect on the project's product. Configuration Management System is a subsystem of the overall project management system. It is a collection of formal documented procedures used to identify and document the functional and physical characteristics of a product, result, service, or component of the project. It also controls any changes to such characteristics, and records and reports each change and its implementation status. It includes the documentation, tracking systems, and defined approval levels necessary for authorizing and controlling changes. Audits are performed as part of configuration management to determine if the requirements have been met. Answer B is incorrect. The scope change control system focuses on reviewing the actual changes to the project scope. When a change to the project's scope is proposed, the configuration management system is also invoked. Answer C is incorrect. The cost change control system is responsible for reviewing and controlling changes to the project costs. Answer D is incorrect. Integrated change control examines the affect of a proposed change on the project as a whole.